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Airbus has had a Priority Takeover button, from the start, I assume Boeing also has something like that. Its primary use case is exactly what you’re talking about, although it also disables autopilot so it’s a good way to ensure you have manual input in case you need to react quickly. Airbus has a dual input alert, apparently Boeing doesn’t, and didn’t add it after this incident, blows my mind. Still they’re far from perfect, stress deafness is absolutely a thing. Active sticks (force feedback) are finally making it into commercial cockpits, they’ve been deployed in business jets, and the Irkut MC-21 was supposed to be the first implementation in an airliner (as it’s french-made, that’s been sunk by the Russian invasion of Ukraine and subsequent economic blockade). This means hopefully active stick swill make it into big two airframes eventually. I assume there’s some redesign work ongoing as it likely requires additional power and data connection, AFAIK currently the sticks (Airbus’s anyway) are just centered and resisting via springs, I don’t think there’s any data fed back into the sticks. |
They did (and I think from the start, because unlike on Boeing's controls which are mechanically linked, there's no easy way of knowing the other pilot is inputting). From the wikipedia article of the crash:
> The inputs cancelled each other out and triggered an audible "dual input" warning.
https://en.wikipedia.org/wiki/Air_France_Flight_447
It's just that, as has been seen on many crashes, hearing is one of the first senses that disappears under heavy stress.